PROVIDENCE, R.I. — José Daniel Guerra-Castañeda struggles to talk about the trauma that has profoundly scarred his body and mind.

False accusations he was a murderer and MS-13 gang member. An unlawful deportation riddled with government errors. Nearly 300 days of torture and starvation in an El Salvador prison. Winning his innocence despite long odds — only to be cuffed and thrown back into U.S. immigration detention for two days after his plane landed in America.